Quantum Hall effect at low magnetic fields

Details Quantum Hall effect at low magnetic fields Quantum Hall effect at low magnetic fields

1999-06-30

arxiv.org/abs/cond-mat/9906450v2

Phys. Rev. Lett. 84, 3141 (2000)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 2 figures, minor corrections, to appear in PRL

Scientific paper

10.1103/PhysRevLett.84.3141

The temperature and scale dependence of resistivities in the standard scaling theory of the integer quantum Hall effect is discussed. It is shown that recent experiments, claiming to observe a discrepancy with the global phase diagram of the quantum Hall effect, are in fact in agreement with the standard theory. The apparent low-field transition observed in the experiments is identified as a crossover due to weak localization and a strong reduction of the conductivity when Landau quantization becomes dominant.

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